CVE-2026-19445 Affecting python311-doc package, versions <3.11.17-150400.9.105.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.52% (45th percentile)

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  • Snyk IDSNYK-SLES154-PYTHON311DOC-21428152
  • published22 Oct 2026
  • disclosed21 Oct 2026

Introduced: 21 Oct 2026

NewCVE-2026-19445  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 python311-doc to version 3.11.17-150400.9.105.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python311-doc package and not the python311-doc package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its sni_callback assigns a different context to SSLSocket.context (the documented way to select a certificate per server name) and nothing else keeps the original ssl.SSLContext alive. Typical cases are servers that create an SSLContext per connection or replace it while connections are open; servers that wrap their listening socket with it are not affected.

Mitigation: keep a reference to every SSLContext that sets sni_callback for the lifetime of the server. TLS clients are not affected.

CVSS Base Scores

version 3.1